
Scarlet Beardtongue
Penstemon barbatus
Not currently listed at our partner nurseries.
Essentials
At a Glance
Plant Type
Perennial
Height
24 inches
Width
18 inches
Light
Full Sun, Partial Sun
Zones
4, 5, 6, 7, 8, 9
Water
Low to moderate
Humidity
Average
Lifespan
Perennial
Native To
Western North America
Toxicity
Non-toxic to humans and pets
The Story
Plant Bio
Penstemon barbatus, commonly known as Bearded Tongue, is a perennial plant valued for its vibrant tubular flowers and ability to attract pollinators. This species is known for its drought tolerance and is favored in rock gardens and xeriscapes.
Bloom Period:
Uses & Benefits:
Marketplace
Where to Buy
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Planting
How to Grow
- Tuck seeds into well-draining soil in early spring for best germination.
- Mist cuttings lightly to maintain humidity and encourage rooting.
- Plant in full sun for optimal growth and flowering.
- Water regularly but avoid waterlogging to prevent root rot.
- Fertilize with a balanced, slow-release fertilizer in spring and summer.
- Prune after flowering to promote bushy growth and remove dead stems.
Pro Tip
Ensure excellent drainage to prevent root rot and promote vigorous flowering.
Keep It Thriving
Care Guide
Do
- Water deeply during dry spells 🌱
- Deadhead spent flowers to encourage more blooms
- Apply mulch to retain soil moisture
Don't
- Overwater to avoid root rot ❌
- Neglect pruning after flowering ❌
- Use heavy, clay soil without amendment ❌
Seasonal Care Calendar
| Task | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Deadhead | ||||||||||||
| Propagate | ||||||||||||
| Prune | ||||||||||||
| Spring Cleanup |
Watch Out For
Pests & Diseases
Common Pests
Common Diseases
In the Garden
Landscape Uses & Companions
Landscape Uses
Companion Plants
Multiply
Propagation Methods
Good to Know
Common Questions
Scarlet Beardtongue questions
What zones can Scarlet Beardtongue grow in?
Scarlet Beardtongue is hardy in USDA Zones 4–9. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.
Is Scarlet Beardtongue deer resistant?
Yes — Scarlet Beardtongue is rated deer-resistant. Deer typically pass it over, though extreme hunger can override any plant's defenses.
When does Scarlet Beardtongue bloom?
Scarlet Beardtongue typically blooms in early summer through late summer. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.
Does Scarlet Beardtongue need full sun?
Scarlet Beardtongue does best in full sun to part shade. In hot climates, afternoon shade keeps blooms fresher longer.
Is Scarlet Beardtongue drought tolerant?
Yes — once established (usually after the first full season), Scarlet Beardtongue handles dry spells with minimal watering. Water deeply its first year to build the root system that makes that possible.
More Penstemon to compare

George Home Penstemon
Penstemon digitalis 'George Home'

Beardtongue Rondo
Penstemon barbatus 'Rondo'

Blackbeard Beardtongue
Penstemon digitalis 'Blackbeard'

Foxglove Beardtongue
Penstemon digitalis

Dark Towers Penstemon
Penstemon digitalis 'Dark Towers'

Blue Springs Penstemon
Penstemon heterophyllus 'Blue Springs'
Keep exploring
Explore the genus
Collections featuring this plant
Grow Scarlet Beardtongue with confidence
See it in a design of your actual yard, get zone-matched care reminders, and track it season by season in your garden journal.
